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CVE-2026-32640 critical CVSS 9.8

Code Injection in simpleeval (CVE-2026-32640)

Summary

code injection in simpleeval (CVE-2026-32640). Successful exploitation can lead to full system takeover. Exploitable via ``names``. Mitigation: upgrade to `1.0.5` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **CVE-2026-32640** has been found in simpleeval. Attackers can target a specific entry point like ``names`` over the network to misuse the product. Successful exploitation can lead to full system takeover. CVSS score: 9.8/10. What to do: upgrade simpleeval to **1.0.5** or later. If unsure, ask your IT team or search "simpleeval CVE-2026-32640" on the vendor's site.
CVE-2026-32640 (simpleeval) — CWE-94 / CVSS v3 9.8 Attack vector: remote (network-reachable) / unauthenticated / no user interaction Attack surface: `names` Patched: `1.0.5` — apply immediately Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs. Refs: see the GHSA / vendor advisory / patched release linked on this page.
❓ What is the problem
**arbitrary code execution** (CWE-94) exists in simpleeval. Attackers reach the vulnerable code path via ``names`` without authentication.
📍 Affected scope
simpleeval — . Attack surface: `names`.
🔥 Severity
Severity: Critical (CVSS 9.8/10). Successful exploitation can lead to full system takeover
🔧 How to fix
Update to **1.0.5**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'simpleeval' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response Actions (7 steps)

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    grep -r 'simpleeval' . | grep -v node_modules

    リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で `simpleeval` を grep し、稼働しているサービス・バージョンを把握する。

  2. 6
    Apply patch patch 
    Upgrade simpleeval to 1.0.5

    ステージング環境で 1.0.5 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 3 で見つけた異常検知の続報チェックを含めること。

  3. 7
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。

Affected packages

PyPI simpleeval
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.5"}]}]
pip simpleeval
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.5"}]}]

References

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